Pregnant Adele with boyfriend Simon Konecki in London on September 4, 2012. Credit: XPOSUREPHOTOS.COM

Mom-to-be Adele is flaunting her pregnancy!

The 24-year-old Grammy-winning singer stepped out with boyfriend Simon Konecki in London on Tuesday wearing a long, tight black dress that showed off her growing baby bump.

Adele wore flats for her walk and a long blue sweater while the nonprofit CEO, 38, followed behind in jeans and a flannel shirt.

The "Someone Like You" singer announced in July she is expecting her first child with Konecki -- who is already a father to a daughter with ex-wife Clary Fisher.

Rumors swirled last week that the couple of nine months had secretly wed, but Adele took to her Twitter account to slam the story. "I'm not married . . . Zzzzzzz," she wrote Aug. 30. Still, wedding bells are on the horizon for the couple of nine months. After Adele revealed she was expecting, sources told Us Weekly that Konecki was already planning on proposing. More than anything, the insider says, the Grammy-winning chart-topper "wants to be a wife and mom."